I agree the retail package should be the most convenient way of storing tea. If it is good for holding the tea in the shop until someone buys it, it should also be good enough to store tea in my home. However, some brands do not use good quality packaging. A lot of the aluminum packs are only plastic with silver color. This is not good for keep good quality of tea. I agree Tea Hong packaging is very good. It is thick paper and real aluminum inside.
However, in Japan it is good politeness to show tea with personal container to guests. Therefore good container is needed to store tea reserved for guests.
